#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
using namespace std;
int x, y;
int ret = 0;
const int day[] = { 0,31,29,31,30,31,30,31,31,30,31,30,31 };
int main()
{
    cin >> x >> y;
    for (int i = 1; i <= 12; i++)
    {
        for (int j = 1; j <= day[i]; j++)
        {
            int k = j % 10 * 1000 + j / 10 * 100 + i % 10 * 10 + i / 10;
            int m = k * 10000 + i * 100 + j;
            if (x <= m && m <= y)
            {
                ret++;
            }
        }
    }
    cout << ret << endl;
    return 0;
}